User-Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:88.0) Gecko/20100101 Firefox/88.0
The resolution 3840x2160 at 60hz is not available in Wayland. I can only run at 30hz in that resolution, or 60hz in lower resolutions. In XOrg, it is not automatically detected. But, I can generate my own modeline and it works just fine.
I attempted this procedure, with my own mode line, which was not successful: https://blogs.nologin.es/rickyepoderi/index.php?/archives/149-Custom-mode-lines-in-Wayland.html
Other details, I am using NVIDIA non-Free drivers from package management. Display is a Samsung Smart TV model number UN43NU7100, and I just updated its software to the latest T-KTM2LAKUC-1310.4.
I am happy to try any patches or configurations, or give you any requested information.
Steps to Reproduce:
1. Install Fedora 34
2. Configure displays
3. Try to select 3840x2160 60hz. Unavailable in the list.
Can only select 30hz in Wayland. 60hz works with some manual Modeline config in Xorg.
Present 60hz as available to select for a 4k refresh rate. Perhaps an "advanced" mode in the display config would allow us to try to force modes that the application for whatever reason does not think are available. I know how to do this in Xorg, but not in Wayland.